Vol.:(0123456789) 1 3 Journal of Radioanalytical and Nuclear Chemistry https://doi.org/10.1007/s10967-020-07164-y Lead sorption by extraction chromatographic resins on the base Di‑ (tert‑butylcyclohexano)‑18‑crown‑6 and its application for analysis of marine samples Illarion Igorevich Dovhyi 1  · Nikolay Alekseevich Bezhin 1,2  · Sergey Viktorovich Kapranov 3  · Alexander Yurievich Lyapunov 4 Received: 21 January 2020 © Akadémiai Kiadó, Budapest, Hungary 2020 Abstract The paper contains the results of determining the physical and chemical characteristics of lead sorption by impregnated sorbents based on Di-(tert-butylcyclohexano)-18-crown-6 and diferent diluents (1,1,7-trihydrododecafuoroheptanol, ionic liquid). The results of studying the infuence of sorption time (kinetics) and lead concentration in the initial solution (iso- therm) on the degree of lead extraction by the obtained sorbents, as well as the selectivity of lead sorption against other met- als, were presented for the frst time. These characteristics are important to justify the ratio of the solution to the sorbent for concentration and separation from related impurities, the rate of transmission of the solution through the sorbent, estimates of the amount of stable tracer to be inserted. The specifc activity of 210 Pb in the Black Sea was determined for the frst time using the obtained sorbents. Samples for determining the specifc activity of 210 Pb in sea water were taken on cruise 101 of the R/V “Professor Vodyanitsky” (December 14–28, 2017). Keywords Lead · Impregnated sorbents · Di-(tert-butylcyclohexano)-18-crown-6 · 1,1,7-trihydrododecafuoroheptanol · Ionic liquid · Seawater Introduction Lead implies a paradoxical combination of the hazard it poses to human health and the environment and its utmost importance for modern industry. A consequence of wide- spread use of lead is lead pollution, which can be found anywhere. Due to global environmental pollution by lead, it has become a ubiquitous component of any plant and animal food. In addition, lead isotopes are among the most toxic radionuclides. Therefore, analytical and radioanalyti- cal monitoring of lead in environmental objects is an urgent task. The equilibrium between the 210 Pb/ 210 Po radioactive pair [1] widely used for determining the fows of suspended organic matter in seawater also makes relevant the search for ways to extract 210 Pb from seawater selectively. To solve these problems, it is optimal to obtain selective sorbents [2–6]. Among the various existing sorption mate- rials, impregnation-type sorbents are of particular interest. They are made by non-covalently fxing organic extractants that efciently extract the target radionuclide on the surface of macroporous supports. Macrocyclic crown ethers are widely used as extract- ants for preparation of the impregnated sorbents for selective extraction of a number of radionuclides [7, 8]. Crown esters are neutral extractants. The extraction of acids with neutral extractants is a known fact [9]. As a rule, the dependence of the metal distribution coefcient * Illarion Igorevich Dovhyi dovhyi.illarion@yandex.ru * Nikolay Alekseevich Bezhin nickbezhin@yandex.ru 1 Marine Hydrophysical Institute, Russian Academy of Sciences, Captain Street, 2, Sevastopol, Russian Federation 299011 2 Sevastopol State University, University Street, 33, Sevastopol, Russian Federation 299053 3 A.O. Kovalevsky Institute of Biology of the Southern Seas, Russian Academy of Sciences, Nakhimovsky Prospect, 2, Sevastopol, Russian Federation 299011 4 A.V. Bogatsky Physico-Chemical Institute, National Academy of Sciences of Ukraine, Lustdorfskaya Doroga Street, 86, Odessa 65080, Ukraine